charles h



(No Model.) O. H. DALRYMPLE.

ROOFING.

No. 533,440. Patented eb; 5, 1895.

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CHARLES H. DA-LRYMPLEQE DETROIT, M-IOHIGAMASSIGNOR OF- ONEJ-IALF TOCHARLES E. HESSEY, OF? HAMILTON, CANADA.

ROOFING.

SPECIFICATION forming part of Letters Patent No. 583,440, dated February5, 1 895.

Application filed June 9,1894. Serial No. 514,004. N sp ns-l T aZZ whomit may concern.-

Be it known that I, CHARLES H. DALRYM- PLE, a citizen of the UnitedStates, residing at Detroit, in the county of Wayne, State of Michigan,have invented certain new and useful Improvements in Roofing; and I dodeclare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same, ref- I erence being had to theaccompanying drawings, and to the letters of reference marked thereon,which form a part of this specification.

This invention relates to roofing; and it consists in a novel processfor treating sulphite wood-fiber, as well as in the new article soproduced and which is particularly useful for roofing.

The following specification describes the process and the product, andit also describes one manner of applying this improved roofing, as shownin the accompanying drawings, in which- Figure 1 is a perspective Viewof a portion of a roof provided with my roofing. Fig. 2 is an enlargedperspective view showing a sheet or strip of the roofing rolled. Fig. 3is an enlarged perspective view of a series of the strips of roofing asin position upon the roof. Fig. at is a cross section through the stripsof roofing and the batten covering the joint between said strips.

The first step of my improved process consists in cutting wood intosmall blocks or pieces, and then grinding the latter in a solution ofsulphites to produce a pulp. Said pulp is then passed through heatingand 00mpressing rollers, from which it issues in a thin sheet of toughfiber, usually known as a bat, whereof the material is known as sulphitewood-fiber. However, any other equivalent method of producing thissulphite wood-fiber may be employed without departing from the spirit ofmy invention.

The second step of my process consists in dissolving india rubber innaphtha, preferably by cutting the rubber into small pieces and mixingit with the naphtha by agitation in the presence of heat, as by placingthe rubber and naphtha in a vessel. which latter is immersed in boilingwater andagitated until the rubber dissolves. About one ounce of thedissolved rubber is then introduced into a gallon of oil, and a suitablepigment may be added at this time if desired although it forms no partof the present invention.

The third step of my process consists in passing a sheet or bat ofsulphite wood-fiber slowly through the solution thus formed until itbecomes thoroughly saturated therewith, and from this solution the batis passed through rollers that will remove any excessive quantities ofthe solution from the surface of the bat, after which the latter ispermitted to dry, and is then ready for use.

Repeated experiment has proven that the composition thus produced isvery cheaply, easily, and quickly made, is excessively flexible anddurable, is entirely water-proof since the wood-fiber is saturated withan impervious solution, and is protected both exteriorly and interiorlyfrom the deteriorating effects of water and air. The toughness andflexibility of the material also render it highly superior for roofingpurposes, as it will yield when trod upon rather than become puncturedor torn, and as it may be readily applied to the roof boards in anysuitable way-one of which I will now describe.

Referring to the said drawings, the letter A designates in Fig. 2 a rollof this material whose longitudinal edges are creased or folded as at b,so that they may be turned up as seen at a in Fig. 4; and O is a battenor strip provided with a longitudinal groove in its under face whichreceives said turnedup edges as clearly indicated. Nails or screws 6 maythen be driven through the batten and "material into the roof timbers orboards; and

the latter will present the appearance best seen in Fig. 1. Although Ido not limit myself to this particular form of joint or manner ofclamping the edges of the strips together, it will be observed that itmakes a simple and durable joint between the meeting edges of I thestrips, and one that is absolutely waterproof because the rain will beshed away from the juncture of the strips and the edges of the latterare sufficiently turned up so that any water which might enter under thebatten would not pass between said edges a.

Having thus fully set forth my invention, whatI claim as new, and desireto secure by Letters Patent, is

1. The herein described roofing material,

5 the same consisting of a hat of sulphite woodabout one ounce ofthedissolved rubber with a gallon of oil, then passing the wood fiberthrough such solution, then passing it be- 15 tween rollers, and finallydrying it, as and for the purposes hereinbefore set forth.

In testimony whereof I affix my signature in presence of two Witnesses.

CHARLES H. DALRYMPLE.

Witnesses:

E. S. WHEELER,

E. K. ROEMER.

